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GuiWebDownload

 

Downloads www file directly to disc with GUI response (TcpSocket, HttpRequest demo)

 

 

main.cpp

 

#include <CtrlLib/CtrlLib.h>

 

using namespace Upp;

 

struct Downloader {

    Progress    pi;

    HttpRequest http;

    int64       loaded;

    String      url;

    FileOut     out;

    String      path;

    

    typedef Downloader CLASSNAME;

    

    void Content(const void *ptr, int size);

    void Perform();

    void ShowProgress();

    void Start();

    

    Downloader();

};

 

Downloader::Downloader()

{

    http.MaxContentSize(INT_MAX);

    http.WhenContent = THISBACK(Content);

    http.WhenWait = http.WhenDo = THISBACK(ShowProgress);

    http.WhenStart = THISBACK(Start);

}

 

void Downloader::Start()

{

    if(out.IsOpen()) {

        out.Close();

        DeleteFile(path);

    }

    loaded = 0;

}

 

void Downloader::Perform()

{

    url = "http://downloads.sourceforge.net/project/upp/upp/4179/upp-x11-src-4179.tar.gz";

    for(;;) {

        if(!EditText(url, "Download", "URL"))

            break;

        pi.Reset();

        http.New();

        path = AppendFileName(Nvl(GetDownloadFolder(), GetHomeDirFile("downloads")),

                              GetFileName(url));

        http.Url(url).Execute();

        if(out.IsOpen())

            out.Close();

        if(!http.IsSuccess()) {

            DeleteFile(path);

            Exclamation("Download has failed.&\1" +

                        (http.IsError() ? http.GetErrorDesc()

                                        : AsString(http.GetStatusCode()) + ' ' + http.GetReasonPhrase()));

        }

    }

}

 

void Downloader::Content(const void *ptr, int size)

{

    loaded += size;

    if(!out.IsOpen()) {

        RealizePath(path);

        out.Open(path);

    }

    out.Put(ptr, size);

}

 

void Downloader::ShowProgress()

{

    if(http.GetContentLength() >= 0) {

        pi.SetText("Downloading " + GetFileName(url));

        pi.Set((int)loaded, (int)http.GetContentLength());

    }

    else {

        pi.Set(0, 0);

        pi.SetText(http.GetPhaseName());

    }

    if(pi.Canceled())

        http.Abort();

}

 

GUI_APP_MAIN

{

    Downloader().Perform();

}

 

 

 

 

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